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Novel axicon capable of generating multiple Bottle beams

A technology of local hollow beam and axicon, applied in optics, optical components, application of diffraction/refraction/reflection for processing, etc., can solve the problems of weak scattering force of trapped particles and small light intensity gradient of local hollow beam, and achieve The effect of strong scattering force, simple structure and high energy conversion efficiency

Active Publication Date: 2015-04-15
HUAQIAO UNIVERSITY
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The existing methods for generating localized hollow beams have a smaller intensity gradient of localized hollow beams and weaker scattering of trapped particles.

Method used

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  • Novel axicon capable of generating multiple Bottle beams
  • Novel axicon capable of generating multiple Bottle beams
  • Novel axicon capable of generating multiple Bottle beams

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Embodiment Construction

[0015] The structure and principle of the axicon of the present invention will be described in further detail below in conjunction with the accompanying drawings and examples.

[0016] The present invention can produce axicons of multiple local hollow beams, such as figure 1 As shown, it includes a base part 1 and a top part 2 arranged along the same axis. The base part 1 has a bottom angle of γ and a radius of the upper bottom surface of R. 2 , the radius of the bottom surface is R 1 The frustoconical structure, where R 2 1 ; The top part 2 is a spherical crown structure with the upper bottom surface of the base part 1 as the bottom surface and the radius of curvature r, the bottom surface of the top part 2 coincides with the upper bottom surface of the base part 1 and is combined together, and the above-mentioned radius of curvature r = R 1 + R ...

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Abstract

The invention discloses a novel axicon capable of generating multiple Bottle beams. The axicon is characterized in that on the basis of a traditional axicon, a part adjacent to the top end is of a spherical structure. According to the novel axicon, multiple Bottle beams can be generated by virtue of a single component; the novel axicon has the advantages of simple component structure, high conversion efficiency, high light loss threshold and energy concentration; the generated multiple Bottle beams are concentrated in energy, so that the particle confinement degree can be improved; a concise and effective new way is provided for acquiring multiple Bottle beams; and the novel axicon has guidance significance to particle control such as particle confinement.

Description

technical field [0001] The invention relates to the field of optical design, in particular to a novel axicon capable of generating multiple Bottle beams (local hollow beams). Background technique [0002] Bottle beam is a special light beam with a dark field on the propagation axis, which is a closed area surrounded by surrounding high-intensity light. Because of this special property, bottle beams are used in many fields of optics, such as optical tweezers, laser catheters, optical wrenches, thick medium imaging, etc., and can also be used for particle trapping, playing an important role in life science and nanotechnology. It has been a hotspot of people's research for several years. [0003] At present, the methods for generating bottle beams mainly include Bessel beam focusing to generate a single bottle beam, two Bessel beams coherently superimposed to generate a self-imaging bottle beam, lasers to directly output bottle beams, and parallel light incident to a new type ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/09G21K1/06
Inventor 吴逢铁程治明方翔范丹丹
Owner HUAQIAO UNIVERSITY
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